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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2018
Earnings Per Share [Abstract] |
Earnings Per Share Computation | The following table presents the calculation of Dominion Energy’s basic and diluted EPS:
| Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
| 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
(millions, except EPS) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to Dominion Energy | $ | 854 |  |  | $ | 665 |  |  | $ | 1,806 |  |  | $ | 1,687 |
Average shares of common stock outstanding – Basic |  | 653.9 |  |  |  | 642.5 |  |  |  | 652.4 |  |  |  | 633.4 |
Net effect of dilutive securities |  | 1.0 |  |  |  | — |  |  |  | 0.4 |  |  |  | — |
Average shares of common stock outstanding – Diluted |  | 654.9 |  |  |  | 642.5 |  |  |  | 652.8 |  |  |  | 633.4 |
Earnings Per Common Share – Basic | $ | 1.31 |  |  | $ | 1.03 |  |  | $ | 2.77 |  |  | $ | 2.66 |
Earnings Per Common Share – Diluted | $ | 1.30 |  |  | $ | 1.03 |  |  | $ | 2.77 |  |  | $ | 2.66 |
Dilutive securities consist primarily of forward sales agreements, effective April 2018. See Note 15 for more information regarding the forward sales agreements. In calculating the diluted EPS in connection with the forward sales agreements, Dominion Energy applies the treasury stock method.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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